With KnotsBag software,
you can design knotwork
very easily on the basis of a graph according to the method of
Christian MERCAT. I wanted to develop this software after reading the
paper "Celtic knotwork" of
Christian MERCAT, Scientific American
"Exotic mathematics", April 2005. I do recommand to visit his
website : http://www.entrelacs.net/
To design knotwork, I
used Bézier curves. For
further information on these bézier curves or any types of
curves, visit the following remarkable website : http://www.mathcurve.com/
...in particular, for knotwork purpose, click on
http://www.mathcurve.com/courbes3d/entrelac/entrelac.shtml
KnotsBag, shareware :
The "Demo" mode
substitutes the freeware version : it allows to create graphs
and
knotwork and to save
your drawings but not to export in SVG and AI vector format
for INKSCAPE, GIMP
and Adobe ILLUSTRATOR.
Try it for
free and have fun without time limit!
The
shareware version
of KnotsBag allows to create graphs and knotwork and to export the
drawing in vector format (SVG
and AI). For the use of
this version, there is a charge of 10 euros (only!).
Parameters of generated Bézier curves are so many that you
have the opportunity to create anything else than knotwork!
Second step:
Link the points selecting a type of
linking (4 possibilities) and clicking successively on the
points:
Third step:
Vary all the parameters of
Bézier curves and colors :

The export can be in .svg for Inkscape and GIMP, or AI for Adobe
Illustrator.
ScreenShots.
Examples of vector format exports
(.svg files and .AI files).
The result of an export in AI vector format is showed hereunder in ILLUSTRATOR :
The result of an export in svg vector format is showed hereunder
in GIMP
(free !!! http://www.gimp.org )
:

Download KnotsBag.
KNOTSBAG is available in english, french, spanish and welsh.
If you want to translate it in your own language, contact me.
Thanks
to Kevin Donnelly
for the welsh version and to Juan-Fidel Luiña Bousquet
for the spanish version.
KnotsBag installation.
 |
 |
 |
 |
1-Unzipp the file "KnotsBag_X_Classic.zip"
2-Drag the folder "KnotsBag_X_Classic" into your "applications" folder.
|
1-Unzipp the file "KnotsBag_X_UB.dmg.zip"
2- Mount the image disk. (click twice on the "KnotsBag_X_UB.dmg" file)
3-Drag the folder "KnotsBag_X_UB" into your "applications" folder.
|
1-Unzipp the file "KnotsBag_Linux.zip"
2-Drag the folder "KnotsBag_Linux" into your hard drive.
|
1-Unzipp the file "KnotsBag_Windows.zip"
2-Drag the folder "KnotsBag_Windows" into your hard drive.
|
Contact.
geraud.bousquet
AT wanadoo.fr ( AT:@ anti-spam)
To order a license number.
To order a license
number (personal registration code) for KnotsBag :
1 : Click on the PayPal button (14 euros ) :
Your license number will be
sent you by email (don't forget to mention your email
address !!! )

Distort a picture by a conformal map.
Step 1 :
Make a drawing
with KnotsBag and export it in SVG format.
Step
2 :
Open the SVG
file with GIMP ( make modifications if you want) and save it in JPEG
format.
Step
3:
Write a
formula (1/z, z^2,log(z)...)
Step
4:
Click on
bouton "Charger une image à déformer" ("Choose a
picture to distort"). (Work with "Safari" or "Internet Explorer")
Step
5: